#include #include using namespace std; int main() { double miles {0.0}; cout << "How many miles?\n"; cin >> miles; if (!cin) { cerr << "Sorry, that wasn't a number.\n"; return EXIT_FAILURE; } if (miles <= 0) || miles >= 100) { cerr << "Sorry, that wasn't a legitimate number.\n"; return EXIT_FAILURE } //3 dollars, plus 70 cents for each 1/5 of a mile. // double dollars {3.00 + .70 * 5 * miles}; double dollars {3.00 + 3.50 * miles}; //Simplier way to do the same thing. cout << dollars << " dollars\n"; return EXIT_SUCCESS; }